<!DOCTYPE html>
<html lang="en">
<head>
    <meta charset="UTF-8">
    <title>Title</title>
</head>
<style>
  .outer {
      border-radius: 50%;
      width: 200px;
      height: 200px;
      background-color: red;
      overflow: hidden;
  }
  .inner {
      background-color: #7c83fd;
      width:200px;
      height:50%;
  }
</style>
<body>
<div class="outer">
    <div class="inner"></div>
</div>
</body>
</html>
